Syringe



' June 11, 1929. L, .3 DE SP IN, 1,716,539

SYRINGE Filed April 1928 WWI/70,?

[ax/AS (535% Patented June 11, 1929.

LOUIS B. DE SPAIN, OF CALDVTELL, IDAHO.

svmnen.

Application filed April a, 1928. Serial No. 286,996.

My invention relates to syringes of the bulb or siphon type in which one end of a tube is submerged in'the water or other liquid to be used and by manual compression of the bulb air is expelled from the tube to produce a siphoning action by which water is drawn into the tube and expelled by further compression M the bulb.

In syringes of this type, asheretofore proposed, the suction or submerged end of the tube is provided with ahard rubber tip containing a lead ball to weight the suction end down and keep it submerged thus precluding the admission or" air. The lead ball does not provide a positive means, however, for maintaining the tube end submerged aecause the tube constantly-tends to assume a curved form and as a consequencethe least rotary movement of the bulb, as he quently occurs in compressing, will turn the tube suficiently to cause the suction end to rise above the water, destroying the siphon, and thus causing great inconvenience.

It is a purpose or my invention to provide in a siphon or bulb syringe means for positively maintaining the suction end of the tube submerged regardless of any twist ing or rotary movement oi"- the tube.

It is also a purpose of my invention to provide as an article of manufacture a device in the nature of an attachment adapted to be substituted for the lead ball device and operating to positively maintain the syringe tube end submerged, the device embodying a suction cup which can be readily applied and firmly secured to the bottom of any rc-- ceptacle from which the water is to be siphoned.

1 will describe only one form of siphon syringe embodying one form of device or attachment embodying my invention and will then point out the novel features thereof in claims.

In the accompanying drawings:

Fig. 1 is a view showing one "form ot syringe embodying my invention in applied position to a liquid receptacle;

Fig. 2 is an enlarged vertical longitudinal sectional view of the securing device embodied in the syringe shown in Fig. 1; and

Fig. 3 is a transverse sectional view taken on the line 33 of Fig. 2.

My invention in its present embodiment comprises a syringe of the bulb type which is conventional in that it includes two lengths of rubber tubing 15 and 16 connected by a rubber bulb 17 with a nozzle 18 on the free end of the tube 16. It will be understood that in the operation of asyringe of this character the bulb 17 is manually and intermittently compressed to Withdraw air from the tube 15 and thus produce a siphonic action which causes the liquid in which the tube is submerged to be drawn into the tube and subsequently expelled through the nozzle 18 by placing the liquid under pressure through continued operation of the bulb.

The device forming the subject-matter of my invention is attached to the suction or intake end of the tube 15, and as illustrated to advantage in Figs. 2 and 3, this device comprises a relatively short length of rubber tubing 19 provided exteriorly at one end with an annular bead 20 so that when the tube is extended into the suction end of the tube 15 the two tubes will be connected against accidental displacement The opposite end of the tube 19 downturned as indicated at 21,and into this downturns-d end a liquid being employed is: adapted to pass into the tube and subsequently into the tube 15. A tube 22 of metal or other suitable material is inserted into the tube 19 for the purpose of stiffening the latter and thereby reducing the possibility 01' the device being accidentally detached from the liquid receptacle in which it is placed.

The tube 19 is of relatively soft rubber and is adapted to be molded integral with a suction cup 23 and in such manner that the cup extends radially from the tube into the same side as the dowi'iturned end 21 in order that when the device is in applied position within the liquid receptacle the downturned end 21 will extend downwardly so as to be disposed at the bottom of the liquid receptacle but in spaced relation thereto to permit the free influx of liquid into the tube 19.

With the device attached to the suction end of the tube 15 as illustrated in Figs. 1 and 2, it may be placed within a basin B containing water or any other suitable liquid to be used, the suction cup 23 being forced downwardly against the bottom of the basin and thereby producing a suction of sulficient intensity to securely hold the cup to the bottom and thereby fix the device at the bottom of the basin so that the downturned tube end 21 is secured in fixed position adjacent the bottom of the receptacle. With the device applied as just described, the bulb 17 can be operated in'the usual manner to withdraw liquid from the basin and discharge it through the nozzle 18. Any turning move ment of the tube 15 arising as a result of -manipulation of the bulb 17 or by reason of any other movement of the syringe will be ineffective to dislodge the suction cup from the bottom of the basin so that the tube end 21 is maintained at the bottom of the basin against rising above the surface of the liquid. Thus the accidental rising of the suction end of the tube 15 above the surface of the liquid and the consequent admission of air and subsequent failure of the syringe to withdraw the liquid from the basin is all prevented and the continued operation of the syringe insured.

I It will, of course, be understood that the the invention and the spirit and scope of the appended claims.

I claim:

1. A device for maintaining the suction end of a syringe tube submerged in a liquid receptacle comprising a tube, a suction cup on the tube, both of which are formed of pliable rubber, and a rigid tube extended into the first tube for stiffening the latter.

2. A device for maintaining the suction end of a syringe tube submerged in a liquid receptacle comprising a tube, and a suction cup on the tube spaced from one end of the latter, said tube end being downturned but terminating above the bottom of the suction cup when the latter is in suction producing position at the bottom of the receptacle.

3. In combination, a syringe having a bulb and a tube with suction end, a second tube connected to the suction end of the first tube, and a sucti'n cup positioned radially on the second tube for securing the latter to the wall of a liquid receptacle and against release by any turning movement of the first tube incident to operation of the bulb of the syringe.

A device for maintaining the suction end of asyringe tube submerged in a liquid receptacle comprising a tube adapted for connection atone end to the syringe tube, and a suction cup secured to the tube between the ends of the latter for securing the tube in horizontal position within the bot tom of a liquid receptacle.

5. A device as embodied in claim at wherein the other end of the tube is downt-urned so as to be disposed in close proximity to the bottom of the liquid receptacle.

Signed at Caldwell, in the county of Canyon and State of Idaho, this 12th day of March, 1928.

. LOUIS B. DE SPAIN. 

